Brushless DC Vibration Motor

Abstract

The invention relates to a brushless DC vibration motor which is characterized in that a vibrator on a rotor is fixed between a bracket and a permanent magnet, so that the upper and lower sides of the vibrator are firmly fixed; the weight of the vibrator can be increased corresponding to the area of the upper end of the permanent magnet, and thus the vibrator facilitates increasing the amount of vibration; the upper and lower ends of a bearing joint are provided with a snap holder which prevents the bearing from being disengaged, and a slotted metal sheet mounting part of a lower casing uses tooth slot shape rather than holes, thereby increasing the overall supporting force of the lower casing; a boss preventing the disengagement of a metal sheet is arranged on the upper end of a slotted metal sheet mounting slot, so that the metal sheet can be firmly stuck to the lower casing; slotted metal sheets are integrated and can be simply plugged into the lower casing for one time, so that the area of the slotted metal sheets is optiized, ejection of the rotor can be inhibited when a motor starts, friction noise with an upper casing can be prevented, the stopping speed of the rotor in rotation can be increased, residual vibration can be eliminated, and an even horizontal plane of the rotor in rotation can be ensured.

Description

technical field [0001] The invention belongs to the field of vibration motors, and relates to brushless direct current (Brushless Direct Current: BLDC) vibration motors for small electronic instruments such as mobile phones, portable game machines, earphones, and wearable devices. Background technique [0002] In order to facilitate the use of consumers, the smartphone market continues to load various functions necessary for daily life. It is necessary to install hardware in a limited space, and it is necessary to miniaturize the hardware. Vibration motors play the role of transmitting signals on mobile communication terminals such as mobile phones and timers, and are widely used in fields that require vibration, such as: in order to achieve the simulation effect of games, they are used in game consoles; It is used as a reminder function on electronic instruments. The above-mentioned electronic products focus on miniaturization, so the vibration motors used in the above-ment...

AI Technical Summary

Problems solved by technology

[0014] Second, insert the alveolar metal plate (34) into the through hole of the lower casing (36), so the alveolar metal plate (34) will break away from the lower casing (36) when an external impact occurs

A neutral zone (neutral zone) is formed between the N pole and the S pole in the magnet (22). If the built-in Hall sensor of the driver IC is just in the neutral zone, there will be a non-start point, so that the motor cannot drive

As a component of the stator, the role of the cogging metal sheet is to make the N pole and S pole of the rotor magnet (22) always be arranged on the Hall sensor, so as to ensure that the rotor stops at the correct position, thereby preventing the non-start point of the motor, and the cogging metal sheet plate (34) detached from the lower housing (36) will not prevent the occurrence of a non-start point

[0015] Third, as in the traditional way, the alveolar metal plate (34) is inserted through the lower casing (36), and the supporting force of the lower casing (36) to the alveolar metal plate (34) is weakened, so the alveolar metal plate (34) is enlarged. There are limitations on the area of ​​the plate (34)

In the past, in order to eliminate such noises, noise-preventing slides or spacers (14) were installed, so the work was cumbersome

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